audacity/lib-src/lv2/lilv/src/collections.c

/*
  Copyright 2008-2014 David Robillard <http://drobilla.net>

  Permission to use, copy, modify, and/or distribute this software for any
  purpose with or without fee is hereby granted, provided that the above
  copyright notice and this permission notice appear in all copies.

  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include "lilv_internal.h"

int
lilv_ptr_cmp(const void* a, const void* b, void* user_data)
{
	return (intptr_t)a - (intptr_t)b;
}

int
lilv_resource_node_cmp(const void* a, const void* b, void* user_data)
{
	const SordNode* an = ((const LilvNode*)a)->node;
	const SordNode* bn = ((const LilvNode*)b)->node;
	return (intptr_t)an - (intptr_t)bn;
}

/* Generic collection functions */

static inline LilvCollection*
lilv_collection_new(ZixComparator cmp, ZixDestroyFunc destructor)
{
	return zix_tree_new(false, cmp, NULL, destructor);
}

void
lilv_collection_free(LilvCollection* coll)
{
	if (coll)
		zix_tree_free((ZixTree*)coll);
}

unsigned
lilv_collection_size(const LilvCollection* coll)
{
	return (coll ? zix_tree_size((const ZixTree*)coll) : 0);
}

LilvIter*
lilv_collection_begin(const LilvCollection* collection)
{
	return collection ? (LilvIter*)zix_tree_begin((ZixTree*)collection) : NULL;
}

void*
lilv_collection_get(const LilvCollection* collection,
                    const LilvIter*       i)
{
	return zix_tree_get((const ZixTreeIter*)i);
}

/* Constructors */

LilvScalePoints*
lilv_scale_points_new(void)
{
	return lilv_collection_new(lilv_ptr_cmp,
	                           (ZixDestroyFunc)lilv_scale_point_free);
}

LilvNodes*
lilv_nodes_new(void)
{
	return lilv_collection_new(lilv_ptr_cmp,
	                           (ZixDestroyFunc)lilv_node_free);
}

LilvUIs*
lilv_uis_new(void)
{
	return lilv_collection_new(lilv_header_compare_by_uri,
	                           (ZixDestroyFunc)lilv_ui_free);
}

LilvPluginClasses*
lilv_plugin_classes_new(void)
{
	return lilv_collection_new(lilv_header_compare_by_uri,
	                           (ZixDestroyFunc)lilv_plugin_class_free);
}

/* URI based accessors (for collections of things with URIs) */

LILV_API const LilvPluginClass*
lilv_plugin_classes_get_by_uri(const LilvPluginClasses* coll,
                               const LilvNode*          uri)
{
	return (LilvPluginClass*)lilv_collection_get_by_uri(
		(const ZixTree*)coll, uri);
}

LILV_API const LilvUI*
lilv_uis_get_by_uri(const LilvUIs* coll, const LilvNode* uri)
{
	return (LilvUI*)lilv_collection_get_by_uri((const ZixTree*)coll, uri);
}

/* Plugins */

LilvPlugins*
lilv_plugins_new(void)
{
	return lilv_collection_new(lilv_header_compare_by_uri, NULL);
}

LILV_API const LilvPlugin*
lilv_plugins_get_by_uri(const LilvPlugins* list, const LilvNode* uri)
{
	return (LilvPlugin*)lilv_collection_get_by_uri((const ZixTree*)list, uri);
}

/* Nodes */

LILV_API bool
lilv_nodes_contains(const LilvNodes* list, const LilvNode* value)
{
	LILV_FOREACH(nodes, i, list)
		if (lilv_node_equals(lilv_nodes_get(list, i), value))
			return true;

	return false;
}

LILV_API LilvNodes*
lilv_nodes_merge(const LilvNodes* a, const LilvNodes* b)
{
	LilvNodes* result = lilv_nodes_new();

	LILV_FOREACH(nodes, i, a)
		zix_tree_insert((ZixTree*)result,
		                lilv_node_duplicate(lilv_nodes_get(a, i)),
		                NULL);

	LILV_FOREACH(nodes, i, b)
		zix_tree_insert((ZixTree*)result,
		                lilv_node_duplicate(lilv_nodes_get(b, i)),
		                NULL);

	return result;
}

/* Iterator */

#define LILV_COLLECTION_IMPL(prefix, CT, ET) \
LILV_API \
unsigned \
prefix##_size(const CT* collection) { \
	return lilv_collection_size(collection); \
} \
\
LILV_API \
LilvIter* \
prefix##_begin(const CT* collection) { \
	return lilv_collection_begin(collection); \
} \
\
LILV_API \
const ET* \
prefix##_get(const CT* collection, LilvIter* i) { \
	return (ET*)lilv_collection_get(collection, i); \
} \
\
LILV_API \
LilvIter* \
prefix##_next(const CT* collection, LilvIter* i) { \
	return zix_tree_iter_next((ZixTreeIter*)i); \
} \
\
LILV_API \
bool \
prefix##_is_end(const CT* collection, LilvIter* i) { \
	return zix_tree_iter_is_end((ZixTreeIter*)i); \
}

LILV_COLLECTION_IMPL(lilv_plugin_classes, LilvPluginClasses, LilvPluginClass)
LILV_COLLECTION_IMPL(lilv_scale_points, LilvScalePoints, LilvScalePoint)
LILV_COLLECTION_IMPL(lilv_uis, LilvUIs, LilvUI)
LILV_COLLECTION_IMPL(lilv_nodes, LilvNodes, LilvNode)
LILV_COLLECTION_IMPL(lilv_plugins, LilvPlugins, LilvPlugin)

LILV_API void
lilv_plugin_classes_free(LilvPluginClasses* collection) {
	lilv_collection_free(collection);
}

LILV_API void
lilv_scale_points_free(LilvScalePoints* collection) {
	lilv_collection_free(collection);
}

LILV_API void
lilv_uis_free(LilvUIs* collection) {
	lilv_collection_free(collection);
}

LILV_API void
lilv_nodes_free(LilvNodes* collection) {
	lilv_collection_free(collection);
}

LILV_API LilvNode*
lilv_nodes_get_first(const LilvNodes* collection) {
	return (LilvNode*)lilv_collection_get(collection,
	                                      lilv_collection_begin(collection));
}